RFQ only mode – checkout not working

I changed the “checkout” page URL to the woocommerce default, and that got it to go through from the cart to the checkout page, however when the person fills out all the info and clicks submit, the page refreshes with an empty woocommerce error — no message, even in inspector, so I can’t troubleshoot where the error is occuring.

I see you are getting an internal server error which does not say much. There is a plugin conflict somehow.
from stack trace it looks like it is stopping somewhere in js code in youtube plus.
As a test see if deactivating youtube plus makes the problem goes away. Also, do you have access to your php error log? Turn on debug in wp-config.php and try to submit and see if there is a fatal error somewhere.

Thank you. There was a syntax error on the customer confirmation email, i fixed that and it appears to be working now. Thank you so much for a fast response and pointing in the right direction!!

Glad it is working.